c# - WebAPI 中未达到带有 FormData 的 HTTP Post

Question

• WebForms 4.5.1、WebAPI 2
• 基于 ABP 样板的项目(http://aspnetboilerplate.com/ 版本 0.4.1.0)

我有一个 Web API Controller 定义如下:

[HttpPost]
public class EmailActivitiesController : ApiController
{
    public HttpResponseMessage EmailAClientWithNewMailMessage(FormDataCollection aFormData)
    {
    }
}

使用以下 jQuery 调用:

    var aFormData =  {};
    $.support.cors = true;
    $.ajax({
        cache: false,
        url: '/api/EmailActivities/EmailAClientWithNewMailMessage',
        type: "POST",
        dataType: "json",
        data: aFormData,
        success: function (callback) {
            //Platform.LoadingPanelHide();
            alert("Successfully sent the email.");
        },
        error: function (data) {
            var errorObject = JSON.parse(data);

            //Platform.LoadingPanelHide();
            alert('There was a problem sending the email message to the individual selected.\n\n' + errorObject.responseText.message);
        }
    });

并且一切正常并且达到了 API 方法。但是，一旦我如下填充 aFormData:

    var aFormData =  {};

    aFormData['aMessageInfo'] = "test";

    //And sending via form data
    $.support.cors = true;
    $.ajax({
        cache: false,
        url: '/api/EmailActivities/EmailAClientWithNewMailMessage',
        type: "POST",
        dataType: "json",
        data: aFormData,
        success: function (callback) {
            //Platform.LoadingPanelHide();
            alert("Successfully sent the email.");
        },
        error: function (data) {
            var errorObject = JSON.parse(data);

            //Platform.LoadingPanelHide();
            alert('There was a problem sending the email message to the individual selected.\n\n' + errorObject.responseText.message);
        }
    });

然后该方法未到达，我收到了一个 HttpResonseCode.OK 和以下 JSON 响应:

{
"result": null,
"success": false,
"error": {
"code": 0,
"message": "An internal error occured during your request!",
"details": null,
"validationErrors": null
},
"unAuthorizedRequest": false
}

对于我的生活，我无法弄清楚为什么会发生这种情况。有没有人有任何见解。

更新

这是 POST 请求。

以及异常日志:

    ERROR 2015-01-29 15:51:08,250 [17   ] Default                                  - Processing of the HTTP request resulted in an exception. Please see the HTTP response returned by the 'Response' property of this exception for details.
System.Web.Http.HttpResponseException: Processing of the HTTP request resulted in an exception. Please see the HTTP response returned by the 'Response' property of this exception for details.
   at System.Web.Http.ModelBinding.FormatterParameterBinding.ReadContentAsync(HttpRequestMessage request, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger, CancellationToken cancellationToken)
   at System.Web.Http.ModelBinding.FormatterParameterBinding.ReadContentAsync(HttpRequestMessage request, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger)
   at System.Web.Http.ModelBinding.FormatterParameterBinding.<ExecuteBindingAsyncCore>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at System.Web.Http.Controllers.HttpActionBinding.<ExecuteBindingAsyncCore>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__0.MoveNext()

更新#2

我现在采用了建议的使用 DTO 的方法，如下所示:

var aMessageInfo = {
            subject: Base64.encode($("#txtSendEmailSubject").val()),
            body: Base64.encode($("#txtSendEmailBody").val())
        };

 $.support.cors = true;
        $.ajax({
            cache: false,
            url: '/api/EmailActivities/Dono2',
            type: "POST",
            dataType: "json",
            contentType: "application/json; charset=utf-8",
            data: JSON.stringify(aMessageInfo),
            success: function (callback) {
                //Platform.LoadingPanelHide();
                alert("Successfully sent the email.");
            },
            error: function (data) {
                var errorObject = JSON.parse(data);

                //Platform.LoadingPanelHide();
                alert('There was a problem sending the email message to the individual selected.\n\n' + errorObject.responseText.message);
            }
        });

然后在 WebAPI 中，如果我只有:

   public class EmailActivitiesController : ApiController
    {
    [HttpPost]
        public HttpResponseMessage Dono2(MessageInfo aMessageInfo)
        {
        }
    }

但只要我也有 EmailAClientWithNewMailMessage 作为方法:

   public class EmailActivitiesController : ApiController
    {
    [HttpPost]
        public HttpResponseMessage Dono2(MessageInfo aMessageInfo)
        {
        }


  [HttpPost]
        public HttpResponseMessage EmailAClientWithNewMailMessage(FormDataCollection aFormData)
        {
}

我得到错误:

{  
   "message":"An error has occurred.",
   "exceptionMessage":"Multiple actions were found that match the request: \r\nDono2 on type MakersLane.WebApi.Controllers.EmailActivitiesController\r\nEmailAClientWithNewMailMessage on type MakersLane.WebApi.Controllers.EmailActivitiesController",
   "exceptionType":"System.InvalidOperationException",
   "stackTrace":"   at System.Web.Http.Controllers.ApiControllerActionSelector.ActionSelectorCacheItem.SelectAction(HttpControllerContext controllerContext)\r\n   at System.Web.Http.Controllers.ApiControllerActionSelector.SelectAction(HttpControllerContext controllerContext)\r\n   at Abp.WebApi.Controllers.Dynamic.Selectors.AbpApiControllerActionSelector.SelectAction(HttpControllerContext controllerContext)\r\n   at System.Web.Http.ApiController.ExecuteAsync(HttpControllerContext controllerContext, CancellationToken cancellationToken)\r\n   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"
}

现在虽然在 Controller Dono2 和 EmailClientWithNewMessage 上有两个 Action ，但我不明白为什么不能区分它们，因为它们显然具有不同的名称，尽管它们都有一个参数，但它们的名称和类型不同。

谁能解释为什么会这样？

Answer 1

我不在 Windows 机器上，所以现在无法测试此写入，但我将在下面提供替代解决方案。从 POST 中发送的查询字符串到 FormDataCollection 的映射存在问题，我认为可以通过使用像这样的 JSON 对象来解决它:

{ aFormData : { aMessageInfo : "test"} }

但我无法确认。我相信以下解决方案更好，所以除非您必须使用 FormDataCollection，否则请使用它。

我建议使用 View 模型而不是 FormDataCollection，因为值的映射变得乏味:

public class Message
{
    public string Client { get; set; }
    public string Content { get; set; }
}

然后将您的 Controller 更改为:

public HttpResponseMessage EmailAClientWithNewMailMessage(Message data)
{
    // use the deserialised object here
    return data.Client;
}

你的 jquery 看起来像这样(注意添加了内容类型参数和 JSON.stringify 调用):

var aFormData =  {};

aFormData['aMessageInfo'] = "test";

//And sending via form data
$.support.cors = true;
$.ajax({
    cache: false,
    url: '/api/EmailActivities/EmailAClientWithNewMailMessage',
    type: "POST",
    dataType: "json",
    contentType: "application/json; charset=utf-8",
    data: JSON.stringify(aFormData),
    success: function (callback) {
        //Platform.LoadingPanelHide();
        alert("Successfully sent the email.");
    },
    error: function (data) {
        var errorObject = JSON.parse(data);

        //Platform.LoadingPanelHide();
        alert('There was a problem sending the email message to the individual selected.\n\n' + errorObject.responseText.message);
    }
});